New Horizons was launched toward Pluto on January 19, 2006, nine-and-a-half years ago. If you look into news accounts of the launch from 2006, you see that many government figures were purposely vague about the timing of the mission, saying only that New Horizons would reach Pluto in the summer of 2015. But mission director Alan Stern said in his launch day press conference that closest approach would be on July 14. So that's a journey of 3 billion miles (5 billion km), completed with a maximum error of 12 hours out of 3462 days,or .014 percent.
I find this amazing, but I suppose you could equally take it as a sign that most of space is completely empty and utterly predictable.